We had a good stay at Sawut's studio apartment...
Pros: perfect size for two, location - quiet and away from crazy centre so was nice to return to after a busy day, safe and secure, good facilities - gym and pool, AC, very fast wifi, 7eleven 2 minute walk away for essentials, pool facing room, good price compared to central Bangkok. Sawut was friendly and met us when we arrived to take us to the room - (although during our stay we felt he could of been a bit more informative and helpful when we tried to contact him).
Cons: location - can be expensive and take a LONG time to get about (distance and crazy Bangkok traffic for example a morning taxi ride to Bangkok will take 2 hours) - we found prices higher (if not double) than listed on profile, no tours will pick you up from location and VERY difficult to get to them early AM (we missed one as the taxi got lost meaning he was 30 mins late and then we hit traffic) limited English spoken so unless uber works you can end up stuck, nearest rail is not walkable and doesn't take you to all parts of city, kitchen only has microwave and fridge so no point staying for use of kitchen as it is limited so we still had to eat out and lastly toilet was a bit dirty and only had half a toilet roll left for us.
It's a shame the condo isn't closer to the city as it would be perfect and you would save a lot of money and time. Next time I will probably look for something closer.
P.S Taxi from airport was 900baht so I would suggest you take the rail to get to air B and B and taxi from local station - you would save a lot and it is very easy to use.